30997830 has 32 divisors (see below), whose sum is σ = 76796928. Its totient is φ = 7999200.

The previous prime is 30997829. The next prime is 30997843. The reversal of 30997830 is 3879903.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15736 + ... + 17595.

It is an arithmetic number, because the mean of its divisors is an integer number (2399904).

Almost surely, 2^30997830 is an apocalyptic number.

30997830 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30997830 is an abundant number, since it is smaller than the sum of its proper divisors (45799098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30997830 is a wasteful number, since it uses less digits than its factorization.

30997830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33372.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 30997830 is about 5567.5694876669. The cubic root of 30997830 is about 314.1307351799.

The spelling of 30997830 in words is "thirty million, nine hundred ninety-seven thousand, eight hundred thirty".